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Circular Aperture

When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.

Distance encoder

The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.

SAM (Smooth Autofocus Motor)

Rather than using the focus drive motor in the camera body, SAM lenses feature an autofocus motor built into to the lens itself that directly drives the focusing element group. Since the built-in motor directly rotates the focus mechanism, operation is significantly smoother and quieter than conventional coupled autofocus drive systems.

Features

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Circular Aperture

When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.

:

SAM (Smooth Autofocus Motor)

Rather than using the focus drive motor in the camera body, SAM lenses feature an autofocus motor built into to the lens itself that directly drives the focusing element group. Since the built-in motor directly rotates the focus mechanism, operation is significantly smoother and quieter than conventional coupled autofocus drive systems.

:

Distance encoder

The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.

Weights and Measurements

Weight (Approx.) : 5.3 oz (150g)

Rated 4.5 out of 5 by 13
reviewers.

Rated 4 out of 5 by tswells817 Great Lens for the Price
I've had this lens for almost a year and I love it. It takes very good photos for the price and is surprisingly durable. It has been wet and been exposed to sand and has not been affected. My favorite thing to shoot with macro lenses are flowers and this lens has not failed me. This lens is a great starter Macro lens and is good to learn Macro photography on. However, the focusing beyond 6' is a little sketchy and the SAM seems to be a little slower than I'd like. The durability of this lens is great given it's made of plastic. All in all I would definitely recommend this lens to someone who's new to DSLR photography or someone who isn't ready to buy a higher-priced Macro lens.
October 12, 2010

Rated 4 out of 5 by jadgl968 Good Macro Lens For The Price
This is a very good little lens! The Images come out sharp and you don't really need a tripod for every macro shot that you take. The build quality is on the low side, as it does feel a bit plasticy and cheap, but I don't have any fears of breaking it. Plus it's practically a steal when you look at the price.
January 28, 2011

Rated 5 out of 5 by DewmanFu a fantastic addition to the lineup
I've only had this for a short while but it's rapidly becoming my 'go to' lens. With a view the equivalent of 45mm , its a great walk around lens with the added bonus of being a macro. I don't have to switch lenses to get close, its got great color and sharpness. For the price its fantastic!
December 31, 2009

Rated 5 out of 5 by HobbyPhotog Great Little Lens
I have had the lens for almost a month. It is a great lens for the price. I would spend $100-$200 more for this lens. I would highly recommend this lens for all levels of photographers. I use it on my SLT A55 camera. I bought this so that I could have a lens that would get me as close to a 50MM lens on a full frame camera. It gets the job done and does it very well.
June 15, 2011

Rated 5 out of 5 by harry2cold I think this lens is great! It's a perfect companion to my 18-55 and 75-300 lenses, especially when you want to get in EXTREMELY close to the subject. I could focus on something closer than I thought I could with this lens. It has a great bokeh effect as well. I have no complaints at all about this product, however, it is plastic, but I'm sure it's very durable. Metal or plastic, I'd still take care of my accessories and lenses well. I'd recommend this lens to ANYONE who is starting out doing macro photography, or even portraits, and it's great for the price!
September 15, 2010

Rated 4 out of 5 by qwert123 pretty good
I am a beginner in macro photography so dont know a lot, but i think this lens is very good to learn more about macro. i took some photos with it, they came out pretty cool.
July 6, 2012

Rated 3 out of 5 by pulseHEAD High quality with some reservations
For macros, this lens provides great image quality. You do a lot of shots handheld, due to the very short 30mm length. However, this lens will mostly need to be used for stationary object macro shots, as the close distance will scare almost any living thing away. The SAM seems to work OK, but does not seem to be much faster than the original screw drive mechanism. Surely it will provide advantages with the new NEX line of cameras.
The build quality is not as great as some of the other lenses in the lineup, but it is only $200 - which makes it a great deal for the money, but *ONLY* if you are using it for macro shots and photos at close distances. Autofocus becomes very (and consistently) inaccurate beyond 6 feet, which is the major (perhaps only) reason that I would not recommend this lens.
June 17, 2010

Rated 5 out of 5 by Juancho Great starter macro lens
Replaced a stolen lens with the same, great value, super photos
February 26, 2012